Info found from UF Health - Mask Tutorial Prototype
This mask is made of two layers of Halyard H600 medical fabric. It
has a roundish shape and darts to snug the mask under the chin.
There is no binding on this mask. The raw edges are topstitched after
insertion of the nose wire and attachment of the ties.
The mask has passed the Respirator Fit Test. NOTE: The masks
will be sterilized after they are returned to the hospital.
INSTRUCTIONAL VIDEOS CAN BE VIEWED AT: